Before my previous motherboard crashing, everything worked perfectly. It crashed, I bought a new one, no big deal. Now.... I have hooked everything up, all wires are accounted for that should be and everything should be working, however, when I try to turn on the computer i push the button and it powers up (LEDs turn on, fans start spinning) and immediately turns off (talking less than a full second after) and won't do it again without switching the master power switch in the back on/off. Anyone have any ideas why it would be doing this??